It simply changes the submit input field from a type of "submit" to a type of "button".
#Jquery validation check with general message at top code
These first three lines of code compensate for Javascript being turned on and off. I know Ryan built the Form Template Processor so wasn't sure if this is a better route to go down?
All I need is something that works, outputs validation without a page refresh and ideally has some anti-spam measures built in. I'm not set on converting over my current form to work with PW as the phpMailer script is a bit out of date now. I'm using the phpMailer script with a bit of jquery to process the form validation. Again, you shouldn’t rely on this, but if you’re only out to deter average people then it’s an easy solution.I am in the process of converting over a one page website to work with PW and am at the stage of hooking up the contact form but it's not working. Of course, if you don’t want to check all the fields you only have to return true if the certain ones pass. You could also use javascript to highlight the invalid fields (not sure if this is what you mean by “ mark an input field as invalid/valid from javascript“) You can do other things too such as alert the error then return false. So in the above example, //error would be replaced by return false. This overrides the default validation function (which by default does nothing). Normally, this the validity method is called on jQuery objects of HTML forms and accepts a function as argument. And the function just returns true if valid and false otherwise. Once jQuery, jQuery.validity and the validity styles are imported we can specify the validation logic using the validity method. Now for the validation part: add onsubmit="return validateForm() to your form tag where validateForm() is the function which does all the checking. I know w3schools isn’t the best source but I find it an okay place to start.
You could also use regular expressions, I won’t explain it all but you could start here. Then you have the value in a variable, there are various ways to check it.įor example, you could do if (parseInt(my_value) < 0) //error. You can grab the value by doing document.getElementById('form_element_id').value (make sure you give the form a name which is sent to the server, and an id which is used by javascript). There are various ways to do it, so I’ll try to give you the general idiom. You should never trust client data and always do checking on the server side.įor example, I could easily find element IDs by inspecting the source code, then do document.getElementById('some_id').setAttribute('max', new_number) to change the max value (this was one of the entries from your link). However, be warned that it is very easy to circumvent client side validation, especially javascript validation. If I understand your question, you can do validation with Javascript. Not exactly elegant, but unfortunately there’s no “pseudo” support with javascript and HTML5 now. You could run this function each time an element loses focus, or whenever you want. You could also have a central validation function which updates these attributes each time (and use dom_object.getAttribute("isvalid") each time). I would add attributes to each tag using dom_tAttribute("isvalid", "true"). Edit: Someone clarified that you’re looking for “valid” “invalid” attributes for DOM.